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Sheet perforation device and its control method

a perforation device and paper sheet technology, applied in the direction of metal working devices, etc., can solve the problems of motor temperature rise, poor braking action, and inability to stop within the time frame, and achieve excellent repeatability. , excellent repeatability

Inactive Publication Date: 2010-02-18
MAX CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a paper-sheet punching device that includes a motor for driving a reciprocatingly movable punching blade and a control means for controlling the punching means. The control means sets divisional control intervals, sets a target passing time for the punching blade, measures the actual passing time of the punching blade, compares the target passing time with the actual measurement, and controls the motor for the punching blade drive in the next interval of the divisional control interval or the next set-group of the divisional control interval. This allows for high-definition and high-resolution speed control during the period of return path time of the punching blade, avoiding situations where the punching blade stops before or after a regular position. The control method is executed by setting divisional control intervals, setting a target passing time for the punching blade, measuring the actual passing time of the punching blade, and comparing the target passing time with the actual measurement. The speed control during the period of return path time of the punching blade is executed with high definition and high resolution.

Problems solved by technology

However, it is insufficient if merely the start timing of the brake is changed, if only employing stop operation control in response to the thickness of the paper-sheets or if only executing the re-drive or the reverse rotation drive by discriminating positions before and after with respect to the desired motor stop position, and owing to an influence of the mechanical time constant (delay coefficient: ξ) of the DC motor, the punching blade unit does not completely stop at the home position and stops at a position deviated from the home position.
Also, when the punch operation is continued for a long time, the motor becomes in a high temperature.
In other words, action of braking becomes worse.
Consequently, when employing a control method in which a reverse rotation brake is activated only during a calculated period of time, the stop is not executed within the allowable range of the home stoppage and there is a fear that a phenomenon in which the punching blade homes out may occur caused by a fact that the motor rotates too much.
In particular, it is very difficult to stop a punching blade having a high speed operation specification within the home position in which the allowable region for the home stop is narrow with excellent repeatability.
Incidentally, there is a fear in which it happens that the punching blade stops before the home position if the brake is activated too earlier and it happens that the punching blade passes over the home position if the brake is delayed.

Method used

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  • Sheet perforation device and its control method
  • Sheet perforation device and its control method
  • Sheet perforation device and its control method

Examples

Experimental program
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Effect test

embodiment 1

[0111]The following will describe control examples (Nos. 1 to 3 thereof) of the punching process unit 20′ relating to a first embodiment with reference to FIG. 9 to FIG. 11. In this embodiment, there is assumed a control in which: the deceleration gear turns fully around one time when the motor 22 rotates based on the motor control signal S20; the cams 82 rotate fully around one time through the cam shaft 81 attached thereto; and the punching blades 21 start from the home position HP, punch the paper-sheets and return to the home position HP again.

[0112]The encoder 206 outputs the number of pulses 1 to 157 with respect to the speed detection signal S23. A case is illustrated in which: comparison with the setting value Th1 is executed when the number of pulses Px is 85≦Px≦99; comparison with the setting value Th2 is executed when the number of pulses Px is 100≦Px≦120; and comparison with the setting value Th3 is executed when the number of pulses Px is 121≦Px≦129. It should be noted ...

embodiment 2

[0134]The following will describe a reverse rotation brake control example during a period of the stop time of the punching blades as a second embodiment with reference to FIGS. 12(A) to 12(C). FIGS. 12(A) to 12(C) are magnified examples of the position (vi) between the state IV and the state V which are shown in FIGS. 5(A) to 5(E).

[0135]In this embodiment, the home position HP is to be set in the interval in which the encoder 206 counts the number of pulses Px by 18 pulses of the speed detection signal S23 after detecting the home-in of the punching blade unit 202 (punching blades 21). For example, when the position sensor 212 detects the home-in of the punching blades 21 and if the number of pulses Px of the encoder 206 is 140, the home position HP becomes 18 pulses from 140 to 157.

[0136]It should be noted that the predetermined number of pulses is set to 8 pulses in order to start the prolongation of the reverse rotation brake control. This is an intermediate position of the home...

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Abstract

A paper-sheet punching device shown in FIG. 4 includes a motor 22 for driving a reciprocatingly movable punching blade 21 and is provided with a punching process unit 20′ for punching two or more holes at one end of paper-sheets 3 and with a CPU 55 for controlling this unit. The CPU 55 detects whether the punching blades 21 rushes into a home position in which the stop position of the punching blades 21 is allowed, executes reverse rotation brake control on the motor 22 for a predetermined period of time from the point of time when the punching blades 21 rushes into the home position, and prolongs the reverse rotation brake control on the motor 22 after the punching blades 21 reaches a predetermined position. It becomes possible to stop the punching blade within the home position when the punching blade stops.

Description

TECHNICAL FIELD[0001]This invention relates to a paper-sheet punching device and a control method thereof preferably applied to a device for punch-processing recording paper-sheets outputted from a copy machine or a print machine. In more detail, it is constituted such that there is provided with control means executing control for punching two or more holes at one end of each of the paper-sheets by means of a reciprocatingly movable punching blade; it is detected whether or not the punching blade rushes into a home position during a stop control of the punching blade; reverse rotation brake of a motor for the punching blade drive is executed until a predetermined period of time elapses from a point of time when the punching blade rushes into the home position; the reverse rotation brake of the motor is prolonged based on time monitoring in a case in which the punching blade reaches a predetermined position within a predetermined period of time; accordingly, it is made possible to s...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B26D5/02B26D5/08
CPCB26D5/00B26D5/02B26F1/14B26F1/0092B26F1/02B26D5/08Y10T83/121Y10T83/04Y10T83/162
Inventor KOBAYASHICHIGIRA, YOSHIO
Owner MAX CO LTD